tg3: Fix inconsistent locking for tg3_netif_start().

Every caller holds tp->lock when calling tg3_netif_start() except
tg3_io_resume().  Fix it so that it is all consistent.  The subsequent
PTP patches add tg3_ptp_resume() to tg3_netif_start() and the tp->lock
is required.

Signed-off-by: Nithin Nayak Sujir <nsujir@broadcom.com>
Signed-off-by: Michael Chan <mchan@broadcom.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c
index ac94939c03e6cae4a8ef94966afa5acbf5c3494b..a4a5e2d329e4345c5c1337f6cadeb7981a671334 100644 (file)
--- a/drivers/net/ethernet/broadcom/tg3.c
+++ b/drivers/net/ethernet/broadcom/tg3.c
@@ -6525,6 +6525,7 @@ static inline void tg3_netif_stop(struct tg3 *tp)
        netif_tx_disable(tp->dev);
 }
 
+/* tp->lock must be held */
 static inline void tg3_netif_start(struct tg3 *tp)
 {
        /* NOTE: unconditional netif_tx_wake_all_queues is only
@@ -16599,8 +16600,8 @@ static void tg3_io_resume(struct pci_dev *pdev)
        tg3_full_lock(tp, 0);
        tg3_flag_set(tp, INIT_COMPLETE);
        err = tg3_restart_hw(tp, 1);
-       tg3_full_unlock(tp);
        if (err) {
+               tg3_full_unlock(tp);
                netdev_err(netdev, "Cannot restart hardware after reset.\n");
                goto done;
        }
@@ -16611,6 +16612,8 @@ static void tg3_io_resume(struct pci_dev *pdev)
 
        tg3_netif_start(tp);
 
+       tg3_full_unlock(tp);
+
        tg3_phy_start(tp);
 
 done: